The Neutron Pile as a Tool in Quantitative Analysis; The Gallium and Palladium Content of Iron Meteorites

Brown, Harrison; Goldberg, Edward D.

doi:10.1126/science.109.2832.347

Cited by 75 publications

(12 citation statements)

References 9 publications

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“…The results are shown in Table 1, column (3), and are consistent with the formula R 3P for schreibersite, where R = iron (Fe), nickel (Ni), and cobalt (Co). Brown (1949) analyzed this specimen for gallium and palladium:" his results are given in Table 2, row (1). The corresponding results for the Albuquerque, New Mexico, and Canyon Diablo No.1 and Canyon Diablo No.2, Arizona, siderites are given in the second, third, and fourth rows, respectively, of Table 2.…”

Section: Analysesmentioning

confidence: 99%

The Odessa, Texas, Siderite (ECN =+ 1025,318)*

Beck

Paz

1951

Contributions of the Meteoritical Society

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This paper presents certain historical facts relating to the discovery of meteorites in the neighborhood of the Odessa, Texas, Meteorite Crater; a discussion of the distribution and other characteristics of the meteoritic materials so far recovered by surface and subsurface search at that crater; a detailed mineralogical and metallographic study of the metallic phase of the meteorite; and chemical and radiochemical analyses of the sideritic material. The results of the investigation, insofar as they relate to the unaltered nickel-iron, are consonant with the classification of Odessa as a coarse octahedrite (Og). Two (2) figures and 2 tables are given.

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Section: Analysesmentioning

confidence: 99%

The Odessa, Texas, Siderite (ECN =+ 1025,318)*

Beck

Paz

1951

Contributions of the Meteoritical Society

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“…concentrations of Pt and Pd metals in iron meteorites selected by previous investigators. Brown and Goldberg [1949] and Goldberg et al [1951] have determined Pd in forty-five iron meteorites by neutron activation, and Hara and Sandell [1960] have determined Ru in seventeen iron meteorites and in the metal phase of two pallasires by absorption spectrophotometry. Herr ei ah [1958] have also determined Ru in the Carbo iron meteorite by neutron activation.…”

Section: Introductionmentioning

confidence: 99%

The distribution of platinum and palladium metals in iron meteorites and in the metal phase of ordinary chondrites

Nichiporuk¹,

Brown²

1965

J. Geophys. Res.

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“…As primeiras determinações de concentração de elementos utilizando a técnica de NAA foram realizadas por Brown e Goldberg [29] em estudo de meteoritos utilizando um reator nuclear com fluxo de nêutron na ordem de 10 12 cm −2 s −1 .…”

Section: Análise Por Ativação Neutrônica (Naa)unclassified

“…O Limite de Detecção (LD) indica a concentração mínima a partir da qual um elemento pode ser detectado eé diretamente proporcional ao contínuo do espectro na região da energia do fóton associado ao decaimento do isótopo de interesse [51,52]. O limite de detecção pode ser calculado utilizando a equação (29).…”

Section: Limites De Detecçãounclassified

Uso de sistema de coincidência gama-gama associado à espectroscopia simples em medidas de análise por ativação neutrônica

Junior¹,

Souza²

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In this study was the developed a γγ acquisition system that make possible to perform Neutron Activation Analysis by single gamma spectroscopy and coincidence γγ spectroscospy simultaneously for the elements As, Co, Cs, La, Sc, Se e Sm. In order to achieve this main goal preliminary measurements in γγ acquisition systems with analogical and digital instrumentation were performed to check the efficiency of technique through measurements of synthetic standard and certified reference material. These measurements also helped to choose the most suitable instrumentation for the development of the acquisition system in the Applied Nuclear Physics Laboratory (LFNA) located at IPEN. The developed system is composed by a CAEN v1724 digitizer board and two hyperpure Germanium detectors. The data acquisition is controled by MC2Analyzer software, which provide raw data of energy and time information of the recorded pulses.Two softwares for data reduction that allow the set the coincident events from single spectra were developed: DPP which prepare the data to be analyzed with softwares for bidimensional espectra.; and AnalisaCaen which handle the data to be analyzed with softwares for single spectra. Determination of the concentration for some elements in certified reference materials and sytnhetic standards were performed applying the conventional and coincidence Neutron Activation Analysis methods. Accuracy and precision of the results obtained by Instrumental Neutron Activation Analysis and Coincidence Instrumental Neutron Activation Analysis were performed by E n score criteria. The results obtained with this system allowed to check the reliability on the determination for the elements As, Co, Cs, La, Sc, Se and Sm. In some cases the concentration results obtained with coincidence measurements were better than the results from single spectroscopy.

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The Neutron Pile as a Tool in Quantitative Analysis; The Gallium and Palladium Content of Iron Meteorites

Cited by 75 publications

References 9 publications

The Odessa, Texas, Siderite (ECN =+ 1025,318)*

The Odessa, Texas, Siderite (ECN =+ 1025,318)*

The distribution of platinum and palladium metals in iron meteorites and in the metal phase of ordinary chondrites

Uso de sistema de coincidência gama-gama associado à espectroscopia simples em medidas de análise por ativação neutrônica

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